Trolley-harp.



PATENTfb MAR. 27, 1906-.

I. H. LUNT. TROLLEY HARP, APRLIOAIIQN FILED SEPT. 6, 1905.

Attorneys UNITE STATES PATENT ()FljlG'Ei ISAAC H. LUNT, or BARRE, VERMONT.

TROLLEY-HARP.

Application filed September 6, 1905. Serial No. 277,187.

Specification of Letters Patent.

Patented. March 27, 1 906 v ley-Harp, of which the following is a specification.

This invention relates to trolley-poles for overhead conductors, and more particularly to means for permitting lateral movement of the trolley wheel in traveling around curves or in passing over switches.

The object of the invention is to provide a casing or housing for attachment to the trolley-pole and adapted to pivotally support the trolley head or harp, said harp being yieldably supported in alinement with the trolley-pole by a pair of centering-springs.

A further object of the invention is to simplify and improve this class of devices so as to add to their utility and durability, as well as, to reduce the .cost of manufacture.

With these and other objects in view the invention consists in the construction and novel combination and arran ement of parts hereinafter fully described, il ustrated in the accompanying drawings, and pointed out in the claims hereto appended, it being understood that various changes in form, proportions, and minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of this invention.

In the accompanying drawings, forming a part of this specification, Figure 1 is a front elevation of a portion of a trolley-pole, showing my improved attachment in position thereon. Fig. 2 is aside view of the same. Fig. 3 is a longitudinal sectional view, and

Fig. 4 is a perspective view, of the casing or housing detached.

Similar numerals of'reference indicate corresponding parts in all the figures of the drawings.

The numeral 5 designates a portion of a trolley-pole the upper end ofwhich is provided with a reduced extension 6, defining oppositelydisposedshoulders -7. Detachably secured to the extension 6, as by screws or similar fastening devices 8, is a casing or housing 9, and pivotally mounted within the casing on a transverse; pin or bolt 10 is the harp or head 11. of the trolley-wheel 12. The casing or housing is substantiall triangular in shape, as shown, and preferab y formed in two sections spaced apart byintegral laterlim-it the lateral movement ally-extending projections or lugs 18'andrigidly secured together in wny suitable manner,

as by rivets or similar'fastening devices 13, each section being formed with a depending 6o arm or extension 14, adapted to engage the shoulders 7.' The shank 15 ofrthe trolley harp is normally supported in alinement with .the trolley-pole by means of oppositely-disposed centeringsprings 16, oneend of each of which bears against the shank 15, while the opposite end thereof passes between the arms 14 and is riveted or otherwise rigidly secured to the trolley-pole, as indicated at 17. By having the trolley-harp pivotally mounted within the casing and yieldably supported in alinement with the trolley-pole the trolley-wheel will readily accommodate itself to any lateral movementof the car in travelingaround curves or inpassing over switches, thereby reducin to a minimum. the friction and wear on 0th the trolley? wheel and overhead conductor.

Attention is called to the fact thatthe in clined walls of the projections 18 serve. to 60 of the trolleyharp, while by removing the pin 10 the harp, together with the trolleywheel,'-may be quickly detached from the casing when it is desired to use a different style of trolley wheel. I i

ltwill thus be seen that there is provided an extremely simple and inexpensive device admirably adapted for the attainment of the j ends in view. 0

Having thus described the invention, what is claimed is-- I 1. The combination with a trolley-pole, of a sectional housing secured to the pole and formedof side sections spaced-a art by lateral projections, a harp pivotal y mounted between the side walls of the housing and springs disposed on each side of the harp for sup ortin the latter in alinement with the tro ey-po e. l 2. The. combination with a trolley-pole, of a housingdetachably secured to the pole a nd formed of a pair of side sections spaced a,- art by lateral projections, a harp mounted for lateral movement between the side sections 10 of the housing, and springssecured tothe trolley-pole and having theirfree ends be'ar ing against the harp for yieldably supporting the latter in alinement with said ole.

3. The combination with a. tro ey-pole, of a sectional housing secured to the pole and formed of detachable side sections spaced apart by lateral projections, the walls of which are inclined or beveled, end a trolleyharp mounted for lateral movement between the sections of the housing and yieldebly supported in alinement with the trolley-pole, the inclined walls of the projections serving to limit the lateral movement of the trolleyhurp.

4. The combination with a trolley-pole, of a. sectional housing detachably secured to the pole and formed oi side sections spaced apart by lateral projections, a trolleydierp mount ed for swinging movement between the sections of the housing, and springs secured to the trolleypole end having their free ends hearing against the harp for 'yieldehly supporting the letter in elineinent with said trolle epole.

"lhe con'ibinetion with e trolley pole 2o rovided with a reduced ext nsion defining (J housing secured to the extension and formed of detachable side sections spaced apart by lateral projections, said side sections being provided with spaced de )ending arms ndepted to engage said shoulders, 11 trolley-harp pivotall mounted for lateral movement between t e side sections of the housing, and snrings secured to tl1e't1' illey-polc between t is depending nuns and having their free ends bearing against the harp for yicldehl y supporting the letter in ulineinent with the trolley-pole in testimony that l cliiini the foregoing as my own I have hereto ellixed my signature 5 in the presence of two witnesses.

ISAAC ll. liUNl.

Wi tnesses:

F. H. ANDRUS, ELWiN L, Soo'rr. 

